Andesw j



(No Model.)

A. J. OULBERTSON.

TACK. No. 257,213. Patented May 2,1882.

Fig. .1

Fig.2. ,4 A J UNITED STATES ATEN FFICE.

ANDREW J. OULBERTSON, OF SAN ANDREAS, CALIFORNIA.

TACK.

SPECIFICATION forming part of Letters Patent No. 257,213, dated May 2,1882. Application filed September 27, 1881. (No model.)

To all whom it may concern:

Be it known that I, ANDREW J. OULBERT- SON, of San Andreas, county ofGalavera-s, State of California, have invented an Improved Harness Tackor Rivet 5 and I do hereby declare the following to be a full, clear,and exact description thereof.

My invention relates to an improvement in tacks for securing the layersof leather or other material together, as will be more fully describedby reference to the accom panyin g drawin gs, in which- Figure 1 is aview of my tack or' rivet. Fig. 2 shows it as turned over to rivet twopieces of leather together. Fig. 3 is a view of a strap, showing themanner of fastening with my tack. Fig. 4 shows the form of tack now inuse as applied to the leather.

My tack A is made of copper or other malleable metal; and it consists ofa round and nearly straight body, with a bar-head resembling a letter T,and it has a tapered and slightly-flattened point, so that when driventhrough the leather and into contact with a piece of iron upon thereverse side this point will be turned back and enter the leather fromthat side so as to clinch or rivet it firmly. This tack is especiallyuseful in securing the parts of harness together and in the formation oflong heavy loops, the work being done more quickly than by sewing, andit will not rip.

To use the tack I take the thickness of leather to be riveted, and usetacks one-eighth of an inch longer than this thickness. If desired, theleather may be channeled to receive the heads of the tacks, or the tacksmay be driven down so that the heads sink into the surface of theleather; but when channeled the leather may be closed over thetack-heads and form a neat finish. The leather is laid upon a 40 pieceof iron, so that when driven the points of the tacks will be reversedand clinched into the leather. A seam formed in this manner presents anearly continuous line or thread of metal to bind the parts together,formed by shaped tacks form too long holes, which are apt to crack so asto unite and form a long out in the line of the seam, which my tack willnot do I am aware that flat V-shaped tacks have been formed by specialmachinery having flat 5 5 elongated heads joined together in acontinuous strip 5 and I do not claim such tacks. They cannot be usedfor a continuous seam, because they are so much wider at the head thanat point that when driven in they will force the leather into a curve,as shown in Fig. 4.

What I do claim as new, and desire to secure by Letters Patent, is-- Animproved harness-tack formed. of malleable metal, having a T-shapedhead, a body having straight parallel sides, and a flattened point.

In witness whereof I have hereunto set my hand.

ANDREW JACKSON OULBERTSON.

Witnesses:

EDWIN CHARLES BowoRrH, JONATHAN FRANKLIN TREAT.

